Sheave crown block



March 24, 1931.

W. W. ERLEWINE SHEAVE CROWN BLOCK Filed March 8, 1928 3 Sheets-Sheet lZ6- Inventor. W61 Her 715E z'lewz'ne r @P M \floraggys.

March 24, 1931.- w. w. ERLEWINE 1,797,406

SHEAVEZ' CROWN BLOCK Filed March 8, 1928 3 Sheets-Sheet 2 Inven toz.

Irene,

. March 24, 1931. w w wm 1,797,406

SHEAVE CROWN BLOCK Filed March 8, 1928 3 Sheets-Sheet 3 InVezgz az';"(liter WEz'ZeWzn e/. W W 5,5,2

Patented Mar. 24, 1931 sHE i E oRowN: n fioek 7 Application file d tie-1611"- 8,

Theobjeet of rthislinx'jr'erition is 'in sr-floy the" Construction ofsheave crown blojcks adapted particularly for fis'e co'liilectioii withoil ell" operation so that e relatively lti'rge'fiumber of sheaves cah'b' e'lnploy'ea for use in connection with the very medern; oil 'Well{zind' th'zit they maybe moil'ntd compactly so that ,the angles ofthelil le'e ru'nni'ng ffom thei'trei-v eling block over the sheaves willnot be'so g eat 'a sf to eau'sethe' lines tofesczipe froIhthe's'heaVe'si Ani ziclcliti'oriztl object is' to mount the sheaves iii a series on asingle straight rigid axle ahd W'itli'the bearing or the entireseriesarra'figecl so that they may be tightened up midztcljustecl-ohseid axle by a sing-1e means, Whereby the sheaves may beniohhte'cl 5nd maim, tallied in their proper relative positions andwill, not wobble'and their hearings will last a relatively long time.

The 1111 nature of the i'fiventio iwfnt e hnder'tood from theaecoiripaiiyinQdraw ings andfollowihg detailed description andol'aiiiis, l I

IIl th6 drawings: l o I h Fig. 1 iS' an elevationof the'sheaxfe orownblock, traveling block and eables 'fcoiihecting them with all but oneSeries of sheztves be ing" omitted. Fig.2 is' a plan View of thecrow'nblock with a: full set of sheeyeshmfint ed thereon: Fig; 3 isasicleeleydtiorrof the uppe i end of 2i derrick and the erow iiblockeho'wnl in Fig.- 2, the lowerfportion of the derrick being. brokenaway'f Fig. 41 1s 570E121? trztl vertical section through lth e seriesof shezw elshiid their mountin on the of F 3',v but one; larger setleg,F'ig. 5 is a seo'tioli similarto that ofFigl 4; bi1t of an'-otherfdzin. Fig. 6 is'a'n end ,elevatioiiof the righth'and end of a;portion of Fig 4. V

'Thereji'sshowfi in Fig; 3 the V011 wen: 161 1 rick 10 ofconim'ohjtypejwith thefsheaiie" ci' 'o wri blo'okmotl ite'cl, tliereoiie, Sti-idkrovs'zh bleak is lfdrmedb f afseries of I-beams 1-1, 12',13

and 14 pdrellel' with eaeh other" and 'ofthe smile dimensidnspreferably, eziefepting they maywaryz in lehgth, a 'showifin Fig.2; 1Thiis, as there shown, the beams 11 are side beams and arerelati'velylong The beams 12 Mid 13m somewhatshorter antl't-he intermediate 192"steer m. semis? b t eiwilil" e; at-wei i they are"eo'rii'ieeted withvintermediate cross travelli igj blo'ek thehce (war the sheaves 22, as'slmwn .ijri 1, ind finally om? th t av llin b ck 2' Q' t e b.1111 lin esheave 20to zi's'alridreel, n 0t shown.

I is imp r' n iflwtt r of pu 'yszz be mounted compactly zi ndeselo'sefio each other as possiblefs'o a's to'lfiihimi'ze the anglebetw'eenlth'emfzind the 'line25 that runs over them to and from thetrlveliiig' block, This as b c m eimu'ch iioreiinpo'rtaht in view f thevery deep oilwellsf that zilfeb eihg drilled in reeelit" time ahd whiohrequire aimueh t longer lihe' and-va la'rger nilfhbe'r of sheaves" 22thaii shallow Wells, andt s'inee there isonly one traveling block','a r1iherezi sein npmber of sheaves increases the angle between the sheayeg:incl the line Q SQQS Oth' tif the Sheaves are not very c oinpaetlynolintd the" lines will 7 esjea'pe'from the sheayes' and ca'luseconsiderabletrouble; Withthe a angem nt vherein set forth for motinting'hthjes e slieeves 22 We zire enabled to ount the' szt m'e humbe'rof sheaes. almost twice as los e together as in r the" crown. block moufl'itiigs heretofore emaxle on which it is mounted.

between the pairs of I-beams there would be no sheave in thesame'alinement. Here there is a sheave beside every I-bearn and all thesheaves 1n the series are mounted on one axle.

I The axle 23 shown in Fig. 4 is of varying shoulders 30,31, 32, 33,34*and35, and the portion on the shaft between each pair of shoulders isof less diameter than-tli'e -pre ceding portion to the left.Consequently the shaft is stepped from end to endand' itfurnishes-portions of difierent diametersbetweenthe pairs of shouldersand on each of which portions a sheave is mounted. Y This requires thesheave's'to have internal bores and roller bearing constructions ofcvarying diameters, the diameters growing less and less from left toright in 4. 5

'Each sheave is provided with a central bearing construction 45 having awidth'abo'ut one-half'of the lengthof the portion of the The rollerbearing on, the left hand sheave is set up snugly against the left handshoulder 30. At the right of the roller bearing, construction of eachsheave there is a sleeve 37. loosely surrounding the portion of the axleon'which the sheave at the left of it'is mounted, The

width of'the axle portion of such sheave and I of the sleeve 37 adjacentthereto is as Sl1OV11, slightly greater than the length of the portionofthe axle on which they are mounted. The successive sheaves to the.right have their roller bearing constructionsheld against the sleeves 37at the left thereof and that arrangement leaves clearance spaces 38which, allow the parts ofthe mechanism to be tightened or taken up toallow for wear. I t

' The bearings of said sheaves are held in place and said wear is takenup by a nut 138 on the threaded small end of the, axle at the 140, inthe reduced outer end of the nut.

Therefore said sin lemeans namel the nut 138, takes up the wear of the.bearings of all the sheaves in the series acting onthein insuccessionthrough the series of roller bearing constructions and sleeves37.

The sleeves 37 are mounted in bearings consisting of an'upper strapportion 41 and a lower thicker bearing portion 241 bolted together asshown in FigsL- 3 and 6. Said lower hearing portions 241 are secured byclamps 44 with the I-beam's below, and their vertical thickness variessuccessively from oneend of the series to the other end thereof,

andfthe bearingv openings for receiving .the

bearing sleeves'37 likewise lncrease lIl diamlVhenthe sheaves areassembled and.

pin 40iextending through longitudinal slots eter successively from oneend of the series to the other, but are in axial alinement. The largehearing at the left hand end of th e axle is marked 42 to distinguish itas it is locked with the axle by the dowel pin The I-be'ams 11, 12 and13 are held rigidly 'in position by the spacers 50 between them neartheir ends and the bolts 51 extend through-the beams and spacers.

In Fig. 5 another form of the invention is shown. The axle 123 is ofuniform diameter throughout the area for mounting sheaves. It has nearits left hand end a shoulder 130 similar to the shoulder 30 of Fig. 4,for the same purpose, Also the sheaves areidentical, or maybeidentical', in size "and parts. The internal bores of the sheaves areof the same diameter and likewise the hearing constructions mountedtherein are of the same diameter and the parts thereof are of the samesize throughout. The bearings 141 for the axle differ from the bearingsin Fig. 4, by extending lower'somewhat than the hub ofth'e sheavessothere will be no interference between them. This enables the sheaves tobeset up closely to each other. This feature of construction could beapplied to Fig. 4 and make that arrangementmore compact if desired. 1

The'adjustme'nt of the sheavesor hearings on the axle in this secondform by the nut 138'and intervening sleeves 37 is the same as in theconstruction shown Fig. 4, excepting that there are nomtermediateshoulders in the modified form to interfere with the lateraladj ust'mentfof thesh'e'ave's. This makes possible a greater amount ofadjustment in Fig. Hence since the take-up for the wear: of the parts ofthe five sheaves would becuniulative, the right hand sheave 22, afterseveral adju'stments,ywould be further to the left than in'Figf 4 onaccount' of the shoulders ofthe latter, and this difference would applyto the three intermediate sheaves in Figp 5, but to a less degree. I V

In Fig. 5 the spacers. 151 are longer than the spacers in Fig. 4, as thetwo I-beams 12 and 13 are omitted to allow greater adjust llU ment' ofthe right hand sheave without interfering with the I -beam anditsbearing.

These sheaves are usually made of man ganese, which is rather'expensiveandcannot be tooled. The bearings in the sheaves heretofore usedwearoutquickly, often before one well is drilled. It isexpensive'. anddifficult torepla'ce'the bearings; so heretoforeit has been usual forthe entire sheave to be [thrown away, when the bearings wear too much,and an entirely'new sheave and bearing construction substituted. .Thismakes such. sheave crown block even more expensive? [The hearing cannotwear very much untilthe sheave begins to wobble, and; then the bearinghas to be eith'r" replaced or adjusted'and taken up as shown in this'ali i I claim: 1'. A. sheave crown' block including a straight rigid axlemountedthereon, a series of sheaves mounted side by side on said axle,

and means on said axle for simultaneously adjusting,-tightening andholding in place all of said sheaves substantially as set forth.

2. A sheave crown block substantially as set forthinclaim 1, saidadjusting, tightening and holding means including a. sleeve surroundingthe axle between each pair of sheaves, a nut adapted to screw on one endof the axle, and a sleeve surrounding the axle 7 between said nut andone of the sheaves, substantially .as set forth,

3. A sheave crown block including a,

straight rigid axle mounted thereon having a shoulder near one endthereof and screw threaded at the other. end, a series of sheavesmounted on said axle, a sleeve on said axle between each pair ofsheaves, a nut on the threaded end of the axle, and a sleeve betweenthenut and first sheave, whereby the sheaves can all be simultaneouslyadjusted "in position on the axle with the sheave remote from said nutbeing jammed against said shoulder and the other sheaves jammed againstthe intervening sleeves, substantially as shown.

' justable I-beams and bearings thereon, an axle mounted in saidbearings, a series of sheaves mounted side by side on said axle,

and means on said axle for simultaneously adjusting, tightening andholding in place all of said-sheaves independently of any ad' justmentof the I-beams and bearings.

5. A sheave crown block including a se= ries of parallel I- beams, a rowof bearings secured thereon having their axes in alinement .with eachother, a straight rigid axlemounted in saidbearings and having ashoulder at one end," a series of sheaves mounted on said axle, asleeve. mounted on said axle and in said bearlng and between each pairof sheaves, a nut screwed on the opposite end ofthe axle,

and a sleeve on said axle between said nut and the nearest sheave, saidsleeves being mount-. ed in said bearings, wherebythe nut'can shiftlaterally all of said sheaves and hold. andtighten the sameinpositi'enon theqaxle subscrewed on the opposite end of the axle andset 4; A sheave crown block including non-ad engaging the adjacentsleeve, substantially as forth. 7. A sheave crown .bloclr including astraight rigid axle having a succession of sections. of differentdiameters separated by shoulders and successivelyreducedin diameter fromone end tothe other of'the axle, a sheave mounted on each section'ofsaid axle near the shoulder at one'side thereof, a sleeve surroundingthe remaining portion of. each section and abutting against the adjacentsheave, the width of each sheaveand its adja- 3 cent sleeve beinggreater than'the section of the shaft on which they are mounted so as toleave a clearance space betweeneach sheave and its adjacent shoulderexcepting the sheave at one end of the series, a nut screw-threaded onthe oppositerend of the axle, and a sleeve between the nut and thenearest sheave, whereby the sheaves can be adjusted to take up wearthereof and held tightly in place substantially as set forth.

8. A sheave crownblock including a series of parallel I-beamsiwiththeirtops in transverse. alinement with each other, bearings,

'each'of which consists of a top strap portion and a bottom thicker,portion, the bottom por- A.

tions of said bearings increasing in vertical thickness from one end ofthe series to the other, an axle having a succession of sections ofdifferent diameters separated by shoulders and successively reduced indiameter from one end to the other of the axle, a sheave mounted on eachsection ofsaid axle near the shoulder at one side thereof, a sleeve ineach of said bearings surrounding the remaining sheave and its adjacentsleeve being greater than the sectionof the shaft on which they aremounted so as toleave'a clearance space,

and a nut screw threaded on the smaller end portion of each axle sectionand "abutting against the adjacent sheave, the width of each of the axlefor laterally. adjusting and tightening'and holding the sheaves andsleeves in place. In Witness whereof fixed my slgnature.

I have hereunto af- I WALTER w. ERLEWINE. A

